Available data:
OKA_20060101_20070102
OKA_20080101_20081230
OKA_20081230_20091229
OKA_20091229_20110104
OKA_20110104_20120103
OKA_20120103_20130101
OKA_20130101_20131231
OKA_20131231_20141230
OKA_20141230_20151229
OKA_20151229_20170103
OKA_20170103_20180102
OKA_20180102_20190101
OKA_20190101_20191231
OKA_20191231_20201229
OKA_20201229_20220104
OKA_20220104_20230103
